Capacitors

A capacitor is a device that stores electrical energy by accumulating electric charges on two closely spaced surfaces that are insulated from each other. It is a passive electronic component with two terminals. A capacitor was originally known as a condenser, a term still encountered in a few compound names, such as the condenser microphone. Colloquially, a capacitor may be called a cap.

process by which neurons communicate with each other by changes in their membrane potentials.

antique electrical device which stores a high-voltage electric charge

A supercapacitor (SC), also called an ultracapacitor, is a high-capacity capacitor, with a capacitance value much higher than solid-state capacitors but with lower voltage limits. It bridges the gap between electrolytic capacitors and rechargeable batteries. It typically stores 10 to 100 times more energy per unit mass or energy per unit volume than electrolytic capacitors, can accept and deliver charge much faster than batteries, and tolerates many more charge and discharge cycles than rechargeable batteries.

A varicap diode, varactor diode, variable capacitance diode, variable reactance diode or tuning diode is a type of diode designed to exploit the voltage-dependent capacitance of a reverse-biased p–n junction.

capacitor whose capacitance may be intentionally and repeatedly changed mechanically or electronically

polarized capacitor whose anode is made of a metal that forms an insulating oxide layer through anodization

thumb|Electrophorus from the 1800s.

fixed-value capacitor in which the ceramic material acts as a dielectric

miniature adjustable electrical component

electronic circuit element implementing a filter

electrolytic capacitor

electrical parameter of real capacitors and inductors

capacitor used to decouple one part of an electrical circuit from another

high failure rate of electrolytic capacitors produced between 1999 and 2007

capacitor based on a ferroelectric material

transfer of energy between circuits via electric fields

hybrid supercapacitor

plot for comparing energy density of energy-storing devices

solid conductive electrolyte

type of capacitor

variable capacitor with a vacuum as the dielectric

scientific instrument demonstrating electric charge

Construction of electrical capacitors

thought experiment in physics

electrolytic capacitor

is a Japanese electronics company headquartered in Ogaki, Gifu prefecture that manufactures electronics-related products, such as printed circuit boards and IC packaging. The company also makes ceramics products, including particulate filters for diesel engines, for which it has a 50% market share in Europe.

customary components for use in electronic equipment

Electrical capacitor used in electric motors